<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>作业1</title>
    <style>
        #box1{
            width: 400px;
            height: 400px;
            border: 1px solid #000;
            margin: 0 auto;
            padding: 100px;
        }
        #box2{
            width: 340px;
            height: 340px;
            border: 2px dashed #000;
            padding: 28px;

        }
        #box3{
            width: 300px;
            height: 300px;
            border: 5px solid #d7effe;
            padding: 20px;
        }
        #box4{
            width: 220px;
            height: 220px;
            background: #ffa0df;
            padding: 40px;
        }
        #div5{
            width:108px ;
            height: 108px;
            border: 5px dotted #fff;
            padding: 50px;
        }
        #box6{
            width: 10px;
            height: 10px;
            border: 5px solid #fcff00;
            background: #96ff38;
            padding: 50px;
        }
    </style>
</head>
<body>
    <div id="box1">
        <div id="box2">
            <div id="box3">
                <div id="box4">
                    <div id="div5">
                        <div id="box6"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>